IPhone battery??

hi, I am using my new iPhone non stop and I'm just wondering if leaving it in its dock to charge all night every night is bad for the battery?? And also I connect abd disconnect it from the computer a but before it is fully charged.. Is this bad for my battery?? Also I should mention it had a food first charge and I allowed it to fully run out.. So if like I said put it on the dock each night would it be harming the battery or is the damage already done??